SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '96098676c34c8c9ef0b278297ff5d6ad19151600d82f5c98f857ea9bd6cef212' 
  AND token = 'M+VE4KtxOvULI5V6HStROiENpw3pguhflQl+rXqGZKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}